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High performance X-ray sensor based on CH3NH2PbBr3 perovskite single crystals and preparation method thereof

A perovskite and X-ray technology, applied in the field of X-ray sensors, can solve the problems of low X-ray sensitivity and large radiation dose, and achieve the effects of high detection sensitivity, low recombination rate and high mobility

Inactive Publication Date: 2017-06-16
SOUTHEAST UNIV
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Problems solved by technology

[0003] The earliest X-ray detection was direct imaging through film, but the sensitivity of film to X-rays is very low, and the radiation dose required for taking pictures is large

Method used

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  • High performance X-ray sensor based on CH3NH2PbBr3 perovskite single crystals and preparation method thereof
  • High performance X-ray sensor based on CH3NH2PbBr3 perovskite single crystals and preparation method thereof
  • High performance X-ray sensor based on CH3NH2PbBr3 perovskite single crystals and preparation method thereof

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Embodiment

[0044] refer to figure 1 is proposed by the present invention based on CH 3 NH 2 PbBr 3 High-performance X-ray sensor of perovskite single crystal, the sensor includes: CH 3 NH 2 PbBr 3 A perovskite single crystal substrate 1, a row electrode 2 is arranged above the perovskite single crystal substrate 1, a column electrode 3 is arranged below the perovskite crystal, front and rear cover plates 5, 6 with lead electrodes 4 and the perovskite The single crystal substrate 1 is packaged to form an X-ray sensor.

[0045] Aiming at the problem that the X-ray absorption rate and the recombination rate of photogenerated carriers are contradictory in the existing digital X-ray sensor, the CH of the present invention 3 NH 2 PbBr 3 Perovskite single crystal substrates are used for photoelectric conversion of x-rays, which can obtain high detection responsivity. CH 3 NH 2 PbBr 3 The preparation method of perovskite single crystal is as follows:

[0046] a) Mix methylamine aque...

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Abstract

The invention discloses a high performance X-ray sensor based on CH3NH2PbBr3 perovskite single crystals and a preparation method thereof. The high performance X-ray sensor is low in cost and high in performance and can be used for digital X-ray detection. The sensor comprises 1. a CH3NH2PbBr3 perovskite single crystal substrate which is prepared by using a temperature changing crystallization method, wherein the single crystals have high crystallization quality and the preparation method is suitable for preparation of the large area substrate; 2. row electrodes which are arranged on the perovskite crystals and formed by conductive material of less X-ray absorption; and 3. column electrodes which are arranged below the perovskite crystals and mutually perpendicular to the row electrodes and formed by metal material of great conductive performance. The CH3NH2PbBr3 perovskite single crystal substrate has high thickness and high atomic number metal and has high photoelectric conversion efficiency for X-rays; besides, the recombination rate of the photo-generated carries in the CH3NH2PbBr3 perovskite single crystal substrate is low so that the X-ray sensor has high sensitivity.

Description

technical field [0001] The invention belongs to the technical field of X-ray sensors, in particular to a CH-based 3 NH 2 PbBr 3 A perovskite single crystal high-performance X-ray sensor and its preparation method, including preparation of X-ray photoelectric conversion material, X-ray sensor structure and device preparation method. Background technique [0002] X-ray imaging is an important medical diagnosis and treatment technology, so the research on new X-ray imaging devices and imaging technology is the goal that people are constantly pursuing. The X-ray detector is an important part of the X-ray imaging system. It converts the X-ray signal into an electrical signal and is the core of the photoelectric conversion of the whole system. High-performance X-ray detectors need to have higher spatial resolution and sensitivity, and larger imaging area. [0003] The earliest X-ray detection was direct imaging through film, but the sensitivity of film to X-rays is very low, a...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K85/60H10K30/00Y02E10/549
Inventor 雷威王昕张晓兵李青陈静王保平
Owner SOUTHEAST UNIV
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